code: def calc_volume(image_numpy, pixdims, mask_value=0):
      return (
          pixdims[0]
          * pixdims[1]
          * pixdims[2]
          * calc_voxel_count(image_numpy, mask_value)
      )
  
file_path: DeepNeuro/deepneuro/outputs/statistics.py
imports: import os
  import numpy
  import matplotlib.pyplot
  from skimage.morphology import label
  from skimage.measure import regionprops
  from deepneuro.utilities.conversion import convert_input_2_numpy
label_desc: Use image node_id 2 for calling a global function with example usage: calc_volume(image_numpy, pixdims, mask_value) and returns: unknown